It reminded me of these old pre-alpha versions of Minecraft. Sadly there's not much to do here. I'd advise you to keep all the textures same size to avoid mixels and make everything looks more consistent. You could also scale the Minecraft textures to their original resolution of 16x16. I'm assuming you downloaded them from the internet, because they're quite blurry. You could scale them back to 16x16 using nearest filtering in some tool like Paint.NET or GIMP (the first one is really easy to use). That would make them sharp again like in Minecraft.
Next time maybe also try to create the game in something that will allow you to make a web build. Many people in game jams only play games in the browser, so if you create a web build you instantly have a lot higher chance of getting some ratings